﻿#ifdef __APPLE__
#include "SysInfoMacImpl.h"
#include <mach/vm_statistics.h>
#include <mach/mach_types.h>
#include <mach/mach_init.h>
#include <mach/mach_host.h>
#include <mach/vm_map.h>

SysInfoMacImpl::SysInfoMacImpl() :
    XSystemInfo()
{
}
double SysInfoMacImpl::memoryUsed()
{
    vm_size_t pageSize;
    vm_statistics64_data_t vmStats;
    mach_port_t machPort = mach_host_self();
    mach_msg_type_number_t count = sizeof(vmStats) / sizeof(natural_t);
    host_page_size(machPort, &pageSize);
    host_statistics64(machPort, HOST_VM_INFO, (host_info64_t)&vmStats, &count);
    qulonglong freeMemory = (int64_t)vmStats.free_count * (int64_t)pageSize;
    qulonglong totalMemoryUsed = ((int64_t)vmStats.active_count + (int64_t)vmStats.inactive_count +
        (int64_t)vmStats.wire_count) * (int64_t)pageSize;
    qulonglong totalMemory = freeMemory + totalMemoryUsed;
    double percent = (double)totalMemoryUsed / (double)totalMemory * 100.0;
    return qBound(0.0, percent, 100.0);
}

void SysInfoMacImpl::init()
{
    mCpuLoadLastValues = cpuRawData();
}
QVector<qulonglong> SysInfoMacImpl::cpuRawData()
{
    host_cpu_load_info_data_t cpuInfo;
    mach_msg_type_number_t cpuCount = HOST_CPU_LOAD_INFO_COUNT;
    QVector<qulonglong> rawData;
    qulonglong totalUser = 0, totalUserNice = 0, totalSystem = 0, totalIdle = 0;
    host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO, (host_info_t)&cpuInfo, &cpuCount);
    for (unsigned int i = 0; i < cpuCount; i++)
    {
        unsigned int maxTicks = CPU_STATE_MAX * i;
        totalUser += cpuInfo.cpu_ticks[maxTicks + CPU_STATE_USER];
        totalUserNice += cpuInfo.cpu_ticks[maxTicks + CPU_STATE_SYSTEM];
        totalSystem += cpuInfo.cpu_ticks[maxTicks + CPU_STATE_NICE];
        totalIdle += cpuInfo.cpu_ticks[maxTicks + CPU_STATE_IDLE];
    }
    rawData.append(totalUser);
    rawData.append(totalUserNice);
    rawData.append(totalSystem);
    rawData.append(totalIdle);
    return rawData;
}
#endif
